How To Make DropdownList No Postback

Sep 12, 2011

How can I make dropdownlist no postback - I have a dropdownlist which I put a code in selected indexchanged - basically for every indexchanged the code will connect to sql and get values then populate textboxes with values.

Here is my code
<asp:DropDownList ID="ddlSalesOrg" runat="server" Style="width: 200px;"
AutoPostBack="true" />

Obviously when I remove the autopostback="true" - then indexchanged will not function as expected.

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I have a FormView bound to a SqlDataSource on my page. One of the controls on the FormView is a DropDownList, which gets populated on Page_Load (it's being populated with a list of file names from a specific folder).

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[Code]...

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I have dropdownlist and set autopostback Property to true.. the problem is that i when i change index of dropdown list Page gets postback. After Completion of Page load index of dropdown goes to 0 automatically.

How can i remain index of dropdownlist after Postback

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I'm running into a little problem with a gridview and a dropdownlist. I can get the dropdownlist to load initially, but when it autopostback's it returns with no value. I am populating the dropdownlist in the RowEditing sub. I'm guessing that I must somehow rebind in the RowDataBound sub, but don't know how to go about it. If I try to find the control's SelectedValue I end up with nothing.

VB Code

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not IsPostBack Then

[Code].....

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I have a page that contains some dynamically created controls (TextBox and DropDownList). When a postback occurs, the TextBoxes keep their values, but the DropDownLists lose their ListItems. This is quite confusing, since the page level DropDownList also keeps its ListItems.

<%@ Page Language="VB"%>
<script runat="server">
Protected Sub Page_Init(ByVal sender As Object, ByVal e As System.EventArgs)

[Code].....

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C# - Possible To Re-DataBind A DropDownList Upon Postback Triggered By SelectedIndexChanged Event?

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[code].....

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I did put the following code in page load but nothing happen, the "-select- also no appear in the dropdownlist.

[Code]...

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2.if i select SN other thn All...the PN shud b visible and if i select "All" ,PN hides.

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function window.onload()
{
DisableProperty();
}

[code]....

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Jun 1, 2009

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I'm writing an intranet ASP.NET page using VB.NET. I've run into a particularly nasty problem dealing with handling file uploads. I'll do my best to explain the problem, and perhaps someone can help.

My problem is almost a duplicate of this one, or this one, except (other than the filename) I don't care about sending the file to the server until the other data has been reviewed. here's the situation:

Joe Q. Dataentry inputs some data into several fields. The first 3 are drop down, and when he changes the selection, a postback event is fired that queries a database for valid entries for the other drop down selections. After selecting the values, he inputs some other data, chooses a file to accompany the data and clicks the "Update" button. When he hits the button, it fires a postback event that sends the current data to the server to be validated. The data will create a change in the database, so he is presented with a view of the current state, and what it will look like when his changes are made. He can now either confirm or cancel the operation for whatever reason.

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[Code]....

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Here's the code...

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[code]....

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I've create a stripped down example below: [UserControl] [Page] [CodeBehind]

UserControl...
<%@ Control Language="vb" AutoEventWireup="false" CodeBehind="BomItem.ascx.vb" Inherits="DynamicUserControl.BomItem" %>
<style type="text/css">

[Code].....

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<DIV id="myDiv" style="display:none;">
<label>some text</label>
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When the page is loaded the following code is invoke
Page load
Dim products As New LinkButton
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[Code] ......

What I want to achieve when the page load I link is create Products when i click on products link it invoke an event handler call getProducts. Getproducts will loop in the database to fetch all record then it will create a link for each product name when i click on the product name it should invoke another event. My problem is how can I re add control after every postback.

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